气候变化领域集成服务门户(CCPortal): Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica

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DOI	10.1016/j.pnsc.2008.01.040
	Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica
	Fang, Aimin; Liu, Xiaohan; Wang, Weiming; Huang, Feixin; Yu, Lianjun
通讯作者	Fang, AM (通讯作者)
发表日期	2009
ISSN	1002-0071
EISSN	1745-5391
起始页码	851
结束页码	859
卷号	19 期号:7
英文摘要	Fossiliferous glacial erratics have been found in moraines of the Grove Mountains, east Antarctica since 1998 by Chinese National Antarctic Research Expedition (CHNARE) teams. These erratics were derived from a suite of glaciogene strata hidden beneath the Antarctic Ice Sheet in the Lambert glacier drainage system, and thus provide a record of Cenozoic paleoenvironmental conditions and fossil biotas that are so far unknown from outcrops and drill cores in this region. By microfossil analysis, sparse Neogene spores and pollen grains are revealed, including: Toroisporis (Lygodiaceae), Granulatisporites (Pteridaceae?), Osmunda (Osmundaceae), Polypodiaceae, Magnastriatites (Parkeriaceae), Deltoidospora, Araucariaceae, Taxodiaceae, Podocarpus (Podocarpaceae), Dacrydium (Podocarpaceae), Pinus (Pinaceae), Keteleeria (Pinaceae), Picea (Pinaceae), Tsuga (Pinaceae), Chenopodiaceae, Artemisia (Asteraceae), Asteraceae, Gramineae, Fraxinoipollenites (Oleaceae), Oleoidearumpollenites (Oleaceae), Oleaceae, Operculumpollis, Nothofagidites (Nothofagus), Rhus, Quercus (Fagaceae), Juglans (Juglandaceae), Pterocarya (Juglandaceae), Liquidambar (Hamamelidaceae), Ulmus (Ulmaceae), Ulmoidepites (Ulmaceae), Tilia, Proteacidites (Proteaceae) and Tricolpopollenites; but without any marine diatoms. Most of the spores and pollen grains in the erratics are considered to originate from local sources except for some older exotic components that might be recycled from the basement sedimentary rocks by the ice sheet, so they are in situ sporo-palynological assemblages. Furthermore, since the source areas of the glaciogenic sedimentary rocks are assumed to be local or in the up glacier areas, the palynological assemblages in these erratics represent an inland terrestrial flora during a warmer period of the ice-sheet evolutionary history. The ages of these erratics are also discussed based on the occurrence of some diagnostic pollens such as the Artemisia, Chenopodiaceae and Nothofagus, which implies Neogene (most probably Pliocene). As a preliminary conclusion, we think that the existence of the Cenozoic glaciogenic rocks and their palynological assemblages present new evidence for a large scale glacial retreat event in the Grove Mountains of east Antarctica, and thus support a dynamic East Antarctic Ice Sheet (EAIS). Furthermore, the absence of marine fossils in the samples analyzed not only provides additional evidence for a terrestrial sedimentary environment of these erratics, but also indicates that there is no transportation of Cenozoic marine fossils from the adjacent areas of the Grove Mountains. (C) 2009 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.
关键词	PLIOCENE SORSDAL FORMATION TRANSANTARCTIC MOUNTAINS SIRIUS GROUP LAMBERT GRABEN VESTFOLD HILLS ICE-SHEET STRATIGRAPHY MARINE RECORD VEGETATION
英文关键词	East Antarctica; Grove Mountains; Glacial erratics; Spores and pollen; Neogene
语种	英语
WOS研究方向	Materials Science ; Science & Technology - Other Topics
WOS类目	Materials Science, Multidisciplinary ; Multidisciplinary Sciences
WOS记录号	WOS:000266345100009
来源期刊	PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257633
推荐引用方式 GB/T 7714	Fang, Aimin,Liu, Xiaohan,Wang, Weiming,et al. Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica[J]. 中国科学院青藏高原研究所,2009,19(7).
APA	Fang, Aimin,Liu, Xiaohan,Wang, Weiming,Huang, Feixin,&Yu, Lianjun.(2009).Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica.PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL,19(7).
MLA	Fang, Aimin,et al."Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica".PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL 19.7(2009).